Doorlock



L. BROWN DOORLOCK Filed Nov. 20, 1924 INVENTOR.

BY Lou .5 BROWN.

' AT TORNEY.

April 20, 1926,

Patented Apr. 20, 1926.

LOUIS BROWN, 0F BROOKLYN, NEW YORK.

UNITED STATES Ji'JOORLOOK.

Application filed November 20, 1924. Serial No. 751,056..

To all whom it may concern:

Be it known that I, LOUIS BROWN, 21. citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented certain new and useful Improvements in Do'orlocks, of which thefollowing is a specification.

This invention relates to locking devices for dumb waiter door and thelike and more particularly to a novel and improved arrangement whereby aplurality of such doors may be simultaneously locked and unlocked.

One of the objects of my invention is to provide an arrangementassociated wlth a plurality of dumb waiter doors whereby a series ofcatches may be simultaneously manipulated from the basement of abuilding to lock and unlock the doors and preventing the opening of anyone of the doors from the outside of the dumb waiter shaft.

In order to more fully understand and appreciate my invention referenceis had to the accompanying drawings, wherein Figure 1 is a sectionalview showing a plurality of dumb waiter doors and the locking mechanismlocated in the dumb waiter shaft of a building.

Figure 2 is a view of the main lock rod showing the doors in theirlocked position.

Referring now to the drawings wherein like reference charactersdesignate corresponding partsthroughout all the views, 5 designates thewall of a dumb waiter shaft, numeral 6 indicating a portion of the dumbwaiter, supported on a cable 7.

A series of guides 8 conveniently located and rigidly secured to thesaid wall, are

adapted to retain a vertical rod 9 extending from the basement to thetop of the shaft. The upper end of the rod has a cable 10 attachedthereto, said cable passing over a pair of pulley wheels 11 and providedwith a suit-able weight 12 whereby the rod may be easily manipulated. Alever 13 is pivotally connected as at 14 and attached to the lower endof the rod so that when said lever is depressed, the rod will be movedupwardly through the guides for the purpose now to be described.

The dumb waiter doors 15 are each provided with an attaching plate 16and hook 17. A latch bar 18 formed with a collar 19 is keyed on the rod9, by a set screw, for

instance, the end of the said latch bar co-* operating with the book 17to lock the dumb waiter door from the inside. Stop collars 19 are alsokeyed on the said rod 9 to limit the movement of the rod. The lever maybe locked by any suitable means such as by a. key operated lock, thusassuring a double safety to the doors. It will thus be seen that accessto the dumb waiter door catch cannot be had unless from the dumb waitershaft and all the doors are held in their locked position being in theirunlocked position when the rod 9 is raised by means of the lever.

Having shown and described my invention what I now claim as new anddesire to secure by Letters Patent is 1. A door lock of the class.described in combination with a series of dumb waiter doors arranged oneabove the other for independent swinging movement within a room, anelongated rod positioned within a shaft, guides for said rod, aplurality of laterally extending latch bars adjustably keyed on the saidrod, catches located on the doors for cooperation with the latch. bars,a shifting lever connected to the lower end of the rod to simultaneouslylock and unlock the said latch bars, and aweighted eleinent connected tothe upper end of the roc.

2. A door lock of the class described in combination with a series ofdumb waiter element connected to the upper end of the rod.

In testimony whereof I aliix my signature. 7

LOUIS BROWN.

